Table 2

Subgroup descriptive analysis

ONHs with a disc area <2 mm²		Normal (n=33)				Glaucomatous (n=22)		p Value
ONHs with a disc area <2 mm²		Mean	SD			Mean	SD	p Value
Age (years)	41.8	13.6		52.2	12.1	0.003
Refractive error (dioptres)	−0.33	1.83		−2.59	3.39	0.001
Mean defect (dB)	1.18	1.22		7.32	6.69	<0.001
Corrected loss variance (dB²)	1.01	1.16		32.02	32.35	<0.001
Global area (mm²)	1.79	0.16		1.73	0.23	0.099
Cup shape measure	−0.24	0.06		−0.11	0.12	<0.001
Rim volume (mm³)	0.45	0.14		0.20	0.13	<0.001
High variation contour (mm)	0.40	0.10		0.40	0.13	0.456
Retinal nerve fibre thickness (mm)	0.27	0.08		0.19	0.08	0.001
Rim area (mm²)	1.53	0.19		0.90	0.36	<0.001
Inferior area below reference (mm²)	0.06	0.05		0.23	0.11	<0.001
Inferior effective area (mm²)	0.24	0.08		0.33	0.10	<0.001
Nasal mean high contour (mm)	−0.04	0.09		0.13	0.09	<0.001
Temporal mean high contour (mm)	0.20	0.12		0.27	0.12	0.019
Superior peak high contour (mm)	−0.12	0.09		0.00	0.11	<0.001
Cup area (mm²)	0.26	0.21		0.82	0.40	<0.001
Cup volume (mm³)	0.05	0.06		0.23	0.22	<0.001
	Normal (n=91)			Glaucomatous (n=101)
ONHs with a disc area between 2 and 3 mm²	Mean	SD		Mean	SD	p Value
Age (years)	44	13.3		55.3	11.7	<0.001
Refractive error (dioptres)	−0.71	1.85		−0.47	2.41	<0.001
Mean defect (dB)	0.91	1.24		7.86	5.17	<0.001
Corrected loss variance (dB²)	1.43	1.21		43.26	40.32	<0.001
Global area (mm²)	2.50	0.28		2.50	0.26	<0.001
Cup shape measure	−0.17	0.08		−0.05	0.10	<0.001
Rim volume (mm³)	0.45	0.19		0.18	0.14	<0.001
High variation contour (mm)	0.42	0.09		0.34	0.12	<0.001
Retinal nerve fibre thickness (mm)	0.26	0.07		0.16	0.07	<0.001
Rim area (mm²)	1.66	0.32		1.00	0.43	<0.001
Inferior area below reference (mm²)	0.20	0.11		0.39	0.15	<0.001
Inferior effective area (mm²)	0.44	0.12		0.51	0.10	<0.001
Nasal mean high contour (mm)	0.03	0.11		0.10	0.09	<0.001
Temporal mean high contour (mm)	0.25	0.11		0.19	0.10	<0.001
Superior peak high contour (mm)	−0.06	0.11		0.00	0.10	<0.001
Cup area (mm²)	0.87	0.43		1.46	0.53	<0.001
Cup volume (mm³)	0.25	0.18		0.50	0.32	<0.001
	Normal (n=70)			Glaucomatous (n=38)
ONHs with a disc area >3 mm²	Mean	SD		Mean	SD	p Value
Age (years)	45.2	14.9		55.6	11.4	<0.001
Refractive error (dioptres)	−0.83	2.07		−0.95	2.75	0.394
Mean defect (dB)	0.80	1.09		6.69	3.9	<0.001
Corrected loss variance (dB²)	1.59	1.20		37.11	31.69	<0.001
Global area (mm²)	3.63	0.63		3.50	0.40	0.141
Cup shape measure	−0.09	0.08		−0.01	0.10	<0.001
Rim volume (mm³)	0.39	0.21		0.17	0.13	<0.001
High variation contour (mm)	0.39	0.11		0.43	0.46	0.239
Retinal nerve fibre thickness (mm)	0.20	0.07		0.15	0.10	0.001
Rim area (mm²)	1.78	0.55		1.08	0.61	<0.001
Inferior area below reference (mm²)	0.43	0.23		0.59	0.20	<0.001
Inferior effective area (mm²)	0.68	0.20		0.71	0.12	0.191
Nasal mean high contour (mm)	0.07	0.11		0.07	0.11	0.462
Temporal mean high contour (mm)	0.19	0.10		0.10	0.13	<0.001
Superior peak high contour (mm)	−0.07	0.07		−0.08	0.16	0.242
Cup area (mm²)	1.84	0.91		2.42	0.67	<0.001
Cup volume (mm³)	0.62	0.47		0.95	0.62	0.001

n = number of eyes; ONHs = optic nerve heads.